Friction thrust for loose drums.



N9- 827,921. PATENTED' AUG. 7, 1906.

- -A. LAMBERT.

FRICTION THRUST FOR LOOSE DRUMS.

APPLICATION FILED JULY 22. 1905.

3 SHEETS-SHEET 1.

%W 34 M Wm 97 fihmm (DZ/67W, 4

PATENTED AUG. '7, 1906.

A. LAMBERT.

FRICTION THR UST FOR LOOSE DRUMS.

APPLICATION FILED JULYZZ, 1905.

s SHEBTSSHEET 2.

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PATENTED AUG. 7, 1906.

, s SHEETS-SHEET a.

A. LAMBERT.

FRICTION THRUST FOR LOOSE DRUMS.

APPLICATION FILED JULY 2' 1905 Parser QFFICE.

ASHER LAMBERT, OF NEWARK, NEW JERSEY.

Specification of Letters Patent.

FRBQTIQN THRUST FOR LOOSE DRUMS.

Patented Aug. 7, 1906.

Application filed July 22, 1905. Serial No. 270,769.

To all whom it may concern.-

Be it known that I, ASHER LAMBERT, a citizen of the United. States,residing at 1 Johnson avenue, Newark, county of Essex, and State of NewJersey, have invented cer tain hew and useful Improvements in. FrictionThrusts for Loose Drums, fully described and represented in thefollowing specification and the accompanying drawings, forming a part ofthe same.

The present invention relates to such constructions as have a drum orspool fitted to turn loosely upon a shaft and rotated by pressureagainst a friction-driver which is positively driven, so to turn thedrum when engaged therewith In many 'hoisters which have a drum rotatedby a friction-driver it is common to press the drum against thefriction-driver by means of a pin extended into the end of thedrum-shaft. Means is used to force the pin longitudinally, and the endof the pin is thus "subjected toheavy pressure and-friction,

which often causes overheating and cripples the whole hoister. In someholsters the pin is allowed to revolve with the drum-shaft and 'ispressed endwise by an adjustable screw Where attempts have been made todrive the drum much above the speed ordinarily used for hoisting, theend of the thrust-pin has become actually welded to the ressure-screw bythe excessive heat, and t 1e hoister has- Besides the use uponhoisting-machines for hoisting thus been completely disabled.

with a derrick such drums are largely employed 1n winding the rope forlogging and operating cableways to haul the load i hrough a greatdistance, which consumes a great deal of time unless the drum be rapidlyrevolved at a much higher speed than is commoli in derrick-hoisting.

The speed of revolution is in practice actually controlled by theoverheating and friction which are created by' the great pressure uponthe thrust-pin and its actuating-screw when the drum is rotated over onehundred revolutions per minute, and the usefulness of such a machine forthe purpose of logging and operating cableways 1S enormously 1ncreasedby any means which Wlll reduce such friction and permits. higher speed.,This is attained in the present invention by fixing the shaftstationary in its bearings upon the hoistenframe and fitting thefriction-driver, as well as the drum, to turn loosely upon the shaft andsupporting the strain of pressing attached thereto.

the drum and friction-driver together by means of antifrictionthrust-bearings applied one outside of the friction-driver and the.

other outside of the drum.

to one end of the shaft, in which a screw is fittedto press upon acentral thrust-pin and a transverse key, by which the latterthrustbearing is forced longitudinally of the shaft to crowd the drumandfriction-driver together. As the screw which produces the thrust issupported upon the stationary shaft or bearing, as well asthe-thrust-pin and the transverse key, there is no rotary motion toproduce friction between these parts, and the drum may therefore berotated at any'de sired speed without injury to these parts.

The thrust or friction is wholly transferred to the antifrictionthrust-bearings between which the friction driver and drum turn upon theshaft, and there is ample room upon the shaft to construct thesethrust-bearings of suitable magnitude to resist the thrustwithoutinjury.

The application of the invention to a hoisting-engine is shown in thedrawings, in which Figure 1 is a plan of the hoisting-engine frame withtwo drums mounted thereon, one of the drums and a part of the stationaryshaft being shown in section at the center line where hatched. Fig. 2 isan elevation of the hoisting-engine. of one of the drum-shafts with drumand friction-driver mounted to turn thereon between the thrust-bearings,the same forming a set of drum-fixtures for application to the bearingsupon a hoister-frame to replace the ordinary-rotary drum-shaft withfriction-driver Fig. 4 shows the inside of one of the antifrictionthrust-bearing flanges containing a ball-race with balls therein, and

Fig. 5 is a central cross-section of-oneof the thrust-bearings Fig. 6 isa perspective view of the hoister.

A designates the frame of .an ordinary hoister on which twosteam-cylinders B are shown and a crank-shaft C, which in practicecarries a inion to mesh into the gear-wheels D upon t 1efriction-drivers E. The frictiondriver is shown as a cone of wood, andthe hauling-drum F is shown formed with a hol low cone G, forming afriction-scat to en age the driver E. The shaft H of the hau ingdrum isshown fir nly fixed in bearings I upon the frame A by means ofset-screws J, and the hub K of the friction-driver is shown formed withai bushing L, which can be renewed when worn, seid bushing turning withthe frictiorndriver upon the stationary shaft H.

One of the thrust-bearings is shown fitted An nntlfrictionthrust-bearing similar to that just' described is shown applied to thshaft H at the outer end of the drum F, the raceway-plate a lyingagainst the piste g,

forming the outer head oft-he druni F on d revolving with the saiddruni, while the reee way-plate I) is held stationery with the shaft bya key N, which 18 inserted transversely through a slot i in the shaft Hand held mewably in piece by pins at the opposite sides of the shaft, asis usual. (Shown in Fig. 1.) The thrust-pin O is shown inserted in ahole in the center of the shaft, which extends from the key to the endof the shaft, end e nut is secured upon the end of "the shaft by formingit in a cup j, which is screwed tightly upon the end of the shaft, so tobecome fixed iirinly thereon. A shoulder Z is shown upon the shaftadjacent to the key, which, with the inner end of the cup j, serves tohold the shaft from end movement in the bearings I. The screw 7;: isreduced upon the end to the some size as the thrust-pin, and when turnedin the out or cup j in the usual manner by hun d-lever l it forces thethrustpin against the key, which presses the outer thrust-collar againstthe drum and engages the drum forcibly with the friction-driver.

It will be observed thet'all of the parts employed in crowding the drumtoward the friction-driver are stationery, being thus relieved from anyrotating or moving friction, as the key N, the pin 0, the cup or nut thescrew and the hand-lever l are held from rotation by the stationaryehemcter of the shaft, while the drum and friction-driver revolveloosely upon the shaft when in operation between the twothrust-bearings.

A hoisting-drum is shown mounted upon a stationary shaft ll, adjacent tothe hauling-drum F, the hoisting-drum being much smaller than theliaulii'ig-drurn, as it is intended to wind the rope with less speed andmovin the thrust-key N 3' attached to the end of the shaft-bearing nextto the friction-driver,end the thrustbearing upon the outside of thefrictiondriver being movable lengthwise of the shaft when the key ispressed toward it, while the friction-driver upon the outer end of thehoisting-drum is fitted egeinst the shoulder upon the shaft to preventit from. moving.

Either construction operates precisely the same, although that shown inconnection with the larger drum avoids any longitudinal movement of thefriction-driver upon the shaft, which when the thrust-bearings areoperated as shown upon the hoisting-drum moves a little outwardly whenthe spring M disengsges "it from the drum. Heretofore the shafts ofhoisting-drums end. analogous spools have been rotated with thefriction-driver, and therefore required journals and hearings fitted toturn one within the other and lined with entifrietion metal orequivalent moons of renewing the surface when worn. bearings upon thestandards R maybe Inside perfectly solid without any expense of forrnmgcups and bolting them on and the shaft slipped endwise into the bearingsby removint the cap 7" or on the shaft of the drum Vhere e.hoisting-machine has been disabled by the use of the old. constructionwith a revolving shaft and a thrust-pin revolving with the shaft, thehoister may be restored to usefulness byremoving the shaft and drum withtheir respective fittings and inserting a shaft such as is shown in Fig.3, with thedrum endfiietion-driver fitted to turn loosely upon the shaftbetween the two thrustrbeeringsgrnd the screw K, mounted in a cap or nutdirectly upon the end of the shaft instead of upon the hearing, as hasheretofore been necessary. The drum-fixtures (shown complete in Fig. 3)thus form a new article of manufecture, which may be made and applied tomany hoisters of a standard type which are already in use, but whichfrequently become disabled from the friction of the thrust-pin.

It will be understood that the nut fonthe tlirust-screw i". can bebolted to or formed integral with one of the beerings, as the shaft whensecured in such bearing is held SttttlOIl-.' ery the some as the nut andthe thrust-screw and thrust-pin operate the same as if the By myconstruetionthe sheftnot were screwed upon the end of the shaft.

(See j in Fig. 1.)

it is obvious that the bearings for the shaft can be formed with boltedcaps; but such construction is not necessary if the shaft be made topull out of the bearings longitudinelly, as shown in Fig. 1, where theshaft next the friction-driver of the drum F is larger than at any otherpoint, so that it can be pulled through its beering by first re-- letterbe attached to the shaft.

In the drewings, steam-cylinders B are and the cop if the vhauling-drum, which coils are constantly the winding of the coils. 3

' vention, what is'claimed herein is upon the shaft at the outer end ofthe drum antifriction thrust-bearings.

shown, and a crank-shaft 0, connected by gearing with thefriction-drivers; but the invention is applicable to hoisters actuatedby electric motors or any other motive power, as the invention relatesto the drum and its shaft and not to the motor agent. Electric hoistersare'now often used in hoistin'g materials to the top of tall buildingswhen in process of erection, and the enormous length of the rope which'is wound upon the drum in such cases necessitates a ra id speed of thedrum to avoid great loss of time in transmitting theload. My inventionis applicable to such hoisters and is of greatvalue in removing thefriction between the thrust pin and the thrust screw, which hasheretofore limited the speed of hoisting-drums.

The hoisting-drum Q, is shown with high flanges at the ends, as the endof the rope is fastened: to the hoisting-drum and wound thereon; but thehauling or traversing drum F is-represented with low flanges, such asare used in traversing the carriage upon a cableway, in which case thecoils do not accumu late upon the drum, as an endless rope is used andonly a few coils are carried around the crowded toward one of the endflanges by The invention is applicable to drums of all kinds which turnoosely upon the shaft and are driven by a friction-driver.

Having thus set forth the nature of the in- 1. The combination, with ashaft having a drum or spool fitted to turn loosely thereon and providedupon its inner end with a friction-seat, of a friction-driver fittedthereto and ada ted to turn loosely upon the shaft, means fer rotatingthe friction-driver, an antifrictionthrust-bearing upon the shaft toprevent the end movementof the frictiondriver, and an antifrictionthrust-bearing with means for pressing one of the thrustbearings towardthe other toengage the drum and friction-driver, whereby the fric-'tion-driver and drum, when engaged rotate together upon-a stationaryshaft between 2. The combination, with a shaft having a drum or spoolfitted to turn loosely thereon and provided upon one end with africtionseat, of a frictionedriver fitted thereto and adapted to turnloosely upon the shaft, and having a hubwith renewable bushing, a spiralspring encircling such hub between the drum and the friction-driver toseparate them normally, an antifriction thrust-bearing upon the shaft toprevent end movement of the friction-driver, means for rotating thedriver, and an antifriction thrust-bearing means attached to the shaftfor pressing such bearing against the drum to engage'lt with thefriction-driver, whereby the friction-driver and drum when engagedrotate together upon a stationary shaft. v

3. The combination, with a shaft having a drum or s 001 fitted to turnloosely thereon and provi ed upon its inner end with a frictionseat, ofa friction-driver fitted thereto and adafpted to'turn loosely upon theshaft, means antifriction thrust-bearing upon the shaft to prevent endmovement of the friction-driver,

or rotating .the friction-driver, an

an a'ntifriction thrust-bearing ap lied to the outer end of the drum,the sha t having a transverse slot adjacent to the outer flange of saidthrust-bearing with key in the slot to .press u on the flange, and meansattached to the en of the shaft for pressing the key to ward such outerflange to engage the drum with the fi'iction-driver, wherebythefriction-driver and drum when engaged rotate together upon a stationaryshaft.

1 4. The combination, with a shaft having a drum or spool fitted to turnloosely thereon and provided upon its inner end with a friction-seat, ofa friction-driver-fittedthereto and ada ted to turn loosely upon theshaft, means or rotating the friction-driver, an antifrictionthrust-bearing upon the shaft to prevent the end movement of thefrictiondriver, an antifriction thrust-bearing ap lied to the outer endof the drum, the shaft flaving a transverse slot adjacent to the outerflange of said thrust-bearing with key in the slot to press 11 on thebearing, a hole extending from the s ot to the end of the shaft withthrust-pin therein, a nut secured upon the end of the shaft withscrew-thread in line with such hole, and a screw fitted to the nut topress the thrust- )in upon-the key, whereby the key, the pin, t e nutand the screw are stationary with the shaft, and the drum andfriction-driver when engaged revolve together upon the shaft.

5. The combination, with a shaft having a drum or spool fitted to turnloosely thereon and having a friction-seat upon the inner end, of aball-race secured upon the shaft adjacent to such end, a friction-driverfitted to turn loosely upon the shaft between said drum and ball-raceand having a correspond ing ball-race with balls fitted-thereto, meansto rotate the friction-driver, a ball-race applied to the outer end ofthe drum, a corre .sponding ball-race movable longitudinally upon theshaft with balls fitted to the said races, and means attached to. theshaft for moving the last-mentioned ball-race to ress the drum towardthe friction-driver, w ereby the-ifriction driver and drum rotatetogether upon a stationary shaft.

6, The combination, with a shaft having a drum or spool fitted to turnloosely thereon and having-a friction-seat upon the inner end, of aball-race secured upon the shaft adjacent to such end, a friction-driverfitted to turn loosely upon the shaft between said drum and ball-raceand having a corresponding hall-race with balls fitted thereto, means tothe movable hall-race with key therein and hole extended from the key tothe end of the shaft, a thrustin fitted to such hole, a cap screwed upont e end of the shaft and having threaded nut therein, and a. screwtitted to the nut with point adapted to press upon the thrust-pin,whereby the outer hall-nice, the key, the pin, the nut and the screw arestationary with the shaft, and the drum and friction-driver when engagedrevolve togetheiupon the shaft.

7. The drum-fixtures for application to the hearings upon the oppositesides of a hoister frame, comprising a shaft with journal near one endfor clamping in the hearing, a thrust- 1 l l i bearing secured upon theshaft adjacent to such journal, a friction-driver fitted to turn upontheshaft in contact with such thrusthearing, a drum fitted to turn uponthe shaft with friction-seat to engage the frictiondriver, a journalupon the opposite end of the shaft to fit the opposite frame-bearing, athrust-hearing between such journal and the end of the drum, and meansattached to the outer end ofthe shaft for pressing, such thrust-hearingagainst the drum, whereby the journals of the shaft are adapted to clamprigidly in the hearings and the drum i and friction-driver when engagedrevolve together upon the shaft.

In testimony whereof I have hereuntp set my hand in the presence oi twosubscribing witnesses.

ASHER LAMBERT.

Witnesses:

E. M. BuRDIcK, 'lnoMAs S. CRANE.

